Pyrrosia Mirbel

Small to medium size climbing epiphytes. Rhizome long-creeping, sometimes-short creeping and +/- compact, densely clothed with elongate or orbicular, dark-centred, entire or fringed, peltate scales, or with paler, basally attached sacles, dictyostelic, often with a sclerotic medullary strand. Fronds shortly to moderately stipitate, the stipe articulate to phyllopodia, winged or terete, several fibro-vascular bundles in an open ring, +/- flared adaxially with 2 longer strands at the constriction, lamina simple, entire, lanceolate or oblanceolate to sublinear, +/- leather, +/- persistently stellate hairy at least on the abaxial surface, not or slightly dimorphic with the fertile fronds or apical parts of fronds narrower and elongate, costa prominent, main lateral veins prominent or obscure (of lacking), straight to the margin, connected by +/- regular cross veins, the areoles each with a few excurrent free veinlets or anastomosis more irregular with free veinlets variously directed, the veinlets often terminated by hydathodes conspicuous on the adaxial surface. Sporangia in discrete round sori terminal on the free veinlets, in several rows between the main veins, or +/- confluent and served by several veins in a single row either side of the costa, superficial or immersed, exindusiate, protected by stellate paraphyses, annulus longitudinal, interrupted, of 14-18 thickened cells, pedicel long, 3-seriate. Spores monolete, smooth to rough, translucent or darkened.